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Pakistan Journal of Biological Sciences
Year: 2000  |  Volume: 3  |  Issue: 6  |  Page No.: 915 - 919

Study on Determination of Planting Time for Some Cauliflower Cultivars (Brassica oleracea var. botrytis) Under Samsun Ecological Conditions by Using Plant Growth and Developmental Models Based on Thermal Time

Sezgin Uzun and Aysun Peksen    

Abstract: In this study, it was aimed to determine the effects of different planting times (01 July, 15 July and 01 August) on the growth and developmental components of some cauliflower cultivars (Snow King, White Cliff, White Rock, White Latin, Me & Carillon, SG 4004 F1 and Serrano) by using plant growth and developmental models. From the results of the present study, it was revealed that thermal time elapsing from planting to curd initiation should be high (about 1200°C days) to stimulate vegetative growth while thermal time elapsing from curd initiation to the harvest should be low (around 200°C days) in terms of curd weight. The highest curd weight and yield were obtained from the plants of the first planting time, namely 01 July, compared to the other planting times (15 July and 01 August). Although there were no significant differences between the cultivars, the highest yield was obtained form Cv. Me & Carillon (13.25 t ha–1), SG 4004 F1 (13.14 t ha–1) and White Rock (11.51 t ha–1) respectively.

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